Fix the install of snapshot CRDs and controller
Fix the install of snapshot CRDs and controller

This PR installs snapshot CRDs and rbac rules from the repo
and installs snapshot controller from a local image if it is
a PR in external-snapshotter repo.
Otherwise it uses main or a stable version.

kubernetes-csi/csi-driver-nfs,kubernetes-csi/csi-driver-nfs,kubernetes-csi/csi-driver-nfs